SCHEDULE 1Support System Standards for Coal Mines
10
In the case of roadways where rockbolts are used as the principal support—
a
the minimum density of rockbolts in the roof must be 1 bolt per square metre;
b
the minimum length of rockbolt in the roof must be 1.8 metres; and
c
the maximum distance between the last completed row of rockbolts and the face must be 3.5 metres.